More yard work

I keep digging myself in deeper and deeper. I found a local couple that has a pile of 12"x6" concrete cylinders they're giving away. I found them through the King County Reusable Materials Exchange. So that means hauling, lifting and stacking 130 or so 30lb concrete cylinders. Why do I keep doing this to myself?

In any case, they'll make a nice border wall in the back yard along the bushes and save myself $300 in the process.